4K Mac Mini At 60hz is possible

Discussion in 'Mac mini' started by ious219, Oct 17, 2016.

  1. ious219 macrumors newbie

    ious219

    Joined:
    Oct 17, 2016
    #1
    Essentially I can get 60hz at 4k on my Mac Mini with a work around. On my Monitor I have a setting PIP/PBP

    This allows two input sources. Use HDMI and Display port into this giving you Side by Side Desktops. Making My Mac Mini think it has two Monitors connected to it at 1920 x 2160. I use App that then combines both Desktops to single Desktop. Only tested this on Windows at this moment. But want to see if I can get it working on OSX

    Obviosuly if I can get 60hz this way it is in theory possible with one cable but it has been limited.
     
  2. ious219 thread starter macrumors newbie

    ious219

    Joined:
    Oct 17, 2016
    #2
    Using this method for Amazon Prime only shows half a Screen so is no good. YouTube seems to be fine.
    It all depends on why you want 60hz 4k.
     
  3. karsten macrumors 6502a

    karsten

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    Sep 3, 2010
    #3
    interesting hack! what's the name of this app to combine the images?
     
  4. Herbit macrumors newbie

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    Feb 17, 2008
    #5
    @ious219 What brand of monitor is that and did you achieve to run in in Sierra in HiDPI mode?
     
  5. ious219 thread starter macrumors newbie

    ious219

    Joined:
    Oct 17, 2016
    #6

    I am using a Samsung 4k 24 Inch Monitor, It works better in windows, than it does in OSX but does work.
    Its not possible to play videos from Certain places this way. 4k Youtube works fine
    HiDPI mode does not work. There would need to be option for HiDPI at 960 x 1080 unless anyone knows option to hack it for that.

    --- Post Merged, Oct 28, 2016 ---
    It is that possible with the 2014 Version. I can play 4k videos at 30hz and most of the time at 60hz
     
  6. Synchro3 macrumors 68000

    Synchro3

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    Jan 12, 2014
    #7
  7. Childs macrumors member

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    May 28, 2010
    #8
    Before buying into and eGPU solution be aware that Akitio is coming out with the Node, which is a TB3 enclosure that can take a full length video card and comes with a 400W PSU. It should be under $300. But to answer your original question, I was able to do 4K@60Hz using the Akitio Thunder 2 and 470 and R280x with the Mac Mini/Macbook Pro 2012.
     
  8. ious219, Oct 30, 2016
    Last edited: Oct 30, 2016

    ious219 thread starter macrumors newbie

    ious219

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    Oct 17, 2016
    #9
    After an update 960 x1080 HiDPl mode showed up. So Times 2 this is same number of pixels as 4K my question is why is this locked out with a single cable. Does using two cables put less strain on the graphics card ?

    On OSX there is contrast between the left and right screens
    I don't know if this is because I am running HDMI and Display port vs 2 Display port cables I have to run 60 / 100 Contrast for web browsing on OSX for the white backgrounds. Playing video I needed to set the Contract to 52 / 100 but I could still see the line between the two desktops.
    Windows there is not much of an issue.

    So unless I want to game (ps4 pro soon) or Watch 4k Video (30hz is fine) (Other than youtube none for computers) I have no real reason for external card yet. You can't even get Amazon Prime at HD on a mac let alone 4k so you need to use other devices.

    [​IMG]
     
  9. ious219 thread starter macrumors newbie

    ious219

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    Oct 17, 2016
    #10
    Missed this it is under Intel HD graphics Settings it called Windows College display mode. Select multiple Monitors on Graphic settings and it is there. Only works on Windows
     
  10. Childs macrumors member

    Joined:
    May 28, 2010
    #11
    My first 4K monitor had PIP modes, so I tried using it to get 4K@60Hz using HDMI and DP on my Mac Pro 2010 and 280x. It worked, but I had a contrast issue as well on each side. I couldnt adjust it to where I wasnt noticeable, so I stopped doing it. 4K@60Hz is such a hassle on otherwise great older Macs. At least with the eGPU option I can get more life out of my MacMini 2012, but it still required some fiddling. I wish Apple would just enable it out of the box already. I guess they want people to buy new machines, but they dont even release new desktops that could do it.
     
  11. ious219, Nov 1, 2016
    Last edited: Nov 1, 2016

    ious219 thread starter macrumors newbie

    ious219

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    Oct 17, 2016
    #12
    I just want to know what code or whats built into the hardware thats stops 60hz over display-port.
    Because if it works with dual cable setup it can't be the graphics cards power.
    HDMI is fair enough.

    Means it is option of OSX 45hz at 4k vs Windows 60hz at 4k. It depends what I would rather have 60hz or OSX. It is even possible to have 5k at 30hz with Mac Mini.
     
  12. ious219 thread starter macrumors newbie

    ious219

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    Oct 17, 2016
    #13
    New update with Single display port cable I was able to get 50hz on Windows, and 60hz on Linux.
    Tried changing custom resolution settings on Windows but I get error not enough bandwidth. Any Pointers ?

    I have the base model.
    I didn't buy a Mac to use Windows screw you apple.
     
  13. EnesM macrumors 6502

    EnesM

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    May 7, 2015
    #14
    The contrast issue is probably because HDMI on Mac Pro is 1.4, and can't do full chroma subsampling @4K60 (4-4-4), so it can't display all the colors correctly.
     
  14. ious219 thread starter macrumors newbie

    ious219

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    Oct 17, 2016
    #15
    but there is no contrast issues On Windows 10 using the same setup
     

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